Some time ago my forum was flooded with bots, which have messed with the original stats of stat-block online-list. I want to revert these stats about when there was the highest number of online users to previous one, from before this incident. However, I cannot find where to edit these stats in MySql. I would appreciate the assistance on that matter.

It's a unix time stamp. If you want it closer to the time you want there are websites out there that will convert unix timestamps to normal time and vice versa. You put the date/time in and it'll give you the long number to put in.